# Relationship history for MSHA mine 1001618

Current hierarchy: **Jean  Swisher; Joe  Swisher → Idaho Mining & Development Company → Maxwell Placer**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Jean  Swisher et al → Maxwell Placer; 1983-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Maxwell Placers → Maxwell Placer; 1983-08-01 to 1984-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Swisher Joe & Jim Maxwell → Maxwell Placer; 1983-08-01 to 1984-08-21; source msha-controller-operator-history
- **controller_controls_operator:** Swisher Joe & Jim Maxwell → Maxwell Placers; 1983-08-01 to 1984-08-21; source msha-controller-operator-history
- **operator_operates_mine:** Idaho Mining & Development Company → Maxwell Placer; 1984-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jean  Swisher et al → Idaho Mining & Development Company; 1984-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Swisher et al → Idaho Mining & Development Company; 1984-08-22 to current/open; source msha-controller-operator-history